The catalytic performance of incorporated V-MCM-41 catalysts for the partial direct oxidation of methane to formaldehyde with molecular oxygen has been investigated. V-MCM-41 catalysts containing 0.56–1.86 wt.% V have been prepared by incorporating the vanadium ions into the framework of mesoporous siliceous MCM-41, resulting in a highly ordered structure with large BET surface area and high su...

Transketolase is a proven biocatalytic tool for asymmetric carbon-carbon bond formation, both as a purified enzyme and within bacterial whole-cell biocatalysts. The performance of Pichia pastoris as a host for transketolase whole-cell biocatalysis was investigated using a transketolase-overexpressing strain to catalyze formation of l-erythrulose from β-hydroxypyruvic acid and glycolaldehyde sub...

Miniemulsion homopolymerization reactions of methyl methacrylate (MMA) and styrene (STY) using poly(L-lactide) as co-stabilizer were carried out in order to prepare poly(L-lactide)/poly(methyl methacrylate) (PLLA/PMMA) and poly(L-lactide)/polystyrene (PLLA/PS) binary blend nanoparticles. The effect of PLLA concentration on methyl methacrylate (MMA) and styrene (STY) homopolymerization reactions...

The splicing of mammalian mRNA precursors requires both protein phosphorylation and dephosphorylation, likely involving modification of members of the SR protein family of splicing factors. Several kinases have been identified that can phosphorylate SR proteins in vitro, and transfection assays have provided evidence that at least one of these, Clk/Sty, can modulate splicing in vivo. But eviden...

SUPPURATION in the adnexa of the eye is always serious, as we can never be sure that the seemingly harmless stye may not cause a retrobulbar phlegmon, and subsequently cavernous sinus thrombophlebitis may develop on account of the rich anastomoses between the two areas. Every ophthalmologist can remember more than one case in which it was impossible to save the patient' life. Until recently, th...

STYLOSA (STY) in Antirrhinum and LEUNIG (LUG) in Arabidopsis control the spatially correct expression of homeotic functions involved in the control of floral organ identity. We show here that the sty mutant also displays alteration in leaf venation patterns and hypersensitivity towards auxin and polar auxin transport inhibitors, demonstrating that STY has a more general role in plant developmen...

Improved production costs will accelerate commercialization of polyhydroxyalkanoate (PHA) polymer and PHA-based products. Plant oils are considered favorable feedstocks, due to their high carbon content and relatively low price compared to sugars and other refined carbon feedstocks. Different PHA production strategies were compared using a recombinant strain of Ralstonia eutropha that produces ...

In this work a comparison between different galaxy luminosity function estimators by means of Monte Carlo simulations is presented. The simulations show that the C − method of Lynden-Bell (1971) and the STY method derived by Sandage, Tammann & Yahil (1979) are the best estimators to measure the shape of the luminosity function. The simulations also show that the STY estimator has a bias such th...

PATHoGEnEsis Anterior blepharitis is oft en associated with excessive bacterial growth on the lid margins. Th e microbes involved are typically the same species that normally reside there, including Staphylococcus epidermidis and Staphylococcus aureus.2 While questions remain about the role(s) of bacteria in blepharitis, it appears that toxic exoenzymes produced by the colonizing species—partic...

Extraction of boron from aqueous solutions using selective resins is important in a variety of applications including desalination, ultrapure water production, and nuclear power generation. Today's commercial boron-selective resins are exclusively prepared by functionalization of styrene-divinylbenzene (STY-DVB) beads with N-methylglucamine to produce resins with boron-chelating groups. However...